1. GPCR/G Protein
  2. Formyl Peptide Receptor (FPR)
  3. HCH6-1

HCH6-1 is a potent and competitive dipeptide antagonist of Formyl peptide receptor 1 (FPR1). HCH6-1 inhibits chemotaxis, superoxide anion generation, and elastase release in human neutrophils specifically activated by fMLF (an FPR1 agonist). HCH6-1 has protective effects against acute lung injury (ALI) in vivo and can be used for the research of FPR1-involved inflammatory lung diseases.

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HCH6-1 Chemical Structure

HCH6-1 Chemical Structure

CAS No. : 1435265-06-7

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10 mM * 1 mL in DMSO
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Customer Review

Based on 3 publication(s) in Google Scholar

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  • Biological Activity

  • Purity & Documentation

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Description

HCH6-1 is a potent and competitive dipeptide antagonist of Formyl peptide receptor 1 (FPR1). HCH6-1 inhibits chemotaxis, superoxide anion generation, and elastase release in human neutrophils specifically activated by fMLF (an FPR1 agonist). HCH6-1 has protective effects against acute lung injury (ALI) in vivo and can be used for the research of FPR1-involved inflammatory lung diseases[1].

IC50 & Target

IC50: Formyl peptide receptor 1 (FPR1)[1]

Cellular Effect
Cell Line Type Value Description References
Neutrophil IC50
0.48 μM
Compound: (2R,2'S)-6
Inhibition of fMLF-induced migration of human neutrophil preincubated for 30 mins followed by fMLF stimulation and measured after 60 mins by luminescence based assay
Inhibition of fMLF-induced migration of human neutrophil preincubated for 30 mins followed by fMLF stimulation and measured after 60 mins by luminescence based assay
[PMID: 32206242]
In Vitro

In a cell-impermeable cytochrome c reduction assay, HCH6-1 significantly inhibits superoxide anion generation in fMLF (FPR1 agonist)-activated neutrophils with an IC50 of 0.32 μM. HCH6-1 has fewer inhibitory effects in WKYMVm (dual FPR1/FPR2 agonist)- and MMK1 (FPR2 agonist)-activated neutrophils, with IC50s of 4.98±0.27 μM and 17.68±2.77 μM, respectively[1].
HCH6-1 does not induce LDH release even at 30 μM, so it does not have cytotoxic effects in human neutrophils. HCH6-1 does not alter the level of xanthine/xanthine oxidase superoxide anion and DPPH radical in cell-free systems[1].
HCH6-1 significantly inhibits elastase release in fMLF-activated neutrophils, with an IC50 of 0.57 μM. However, in neutrophils triggered by WKYMVm or MMK1, HCH6-1 inhibits elastase release at higher concentrations, with IC50s of 5.22±0.69 μM and 10.00±0.65 μM, respectively[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

In Vivo

HCH6-1 (intraperitoneal injection; 50 mg/kg; 1 h before LPS spray or 30 min after LPS spray) alone does not induce airspace inflammation. HCH6-1 pretreatment reduces inflammatory cell infiltration and distortion of pulmonary architecture in the presence of LPS. HCH6-1 posttreatment shows inhibitory effects on neutrophil accumulation and lung damage in LPS-induced ALI mice[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Model: C57BL/6 mice (20-25 g, 7-8 weeks old)[1]
Dosage: 50 mg/kg
Administration: Intraperitoneal injection; 50 mg/kg; 1 h before LPS spray or 30 min after LPS spray
Result: Ameliorated ALI in LPS-induced mice.
HCH6-1-mediated decreasing of neutrophil recruitment serves as a protective mechanism in ALI mice.
Molecular Weight

469.53

Formula

C28H27N3O4

CAS No.
Appearance

Solid

Color

White to off-white

SMILES

O=C(N[C@H](C(N[C@@H](C(OC)=O)CC1=CC=CC=C1)=O)CC2=CNC3=C2C=CC=C3)C4=CC=CC=C4

Shipping

Room temperature in continental US; may vary elsewhere.

Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 2 years
-20°C 1 year
Solvent & Solubility
In Vitro: 

DMSO : 250 mg/mL (532.45 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.1298 mL 10.6489 mL 21.2979 mL
5 mM 0.4260 mL 2.1298 mL 4.2596 mL
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

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In Vivo:

Select the appropriate dissolution method based on your experimental animal and administration route.

For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

  • Protocol 1

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

    Solubility: ≥ 2.08 mg/mL (4.43 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

    Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
  • Protocol 2

    Add each solvent one by one:  10% DMSO    90% Corn Oil

    Solubility: ≥ 2.08 mg/mL (4.43 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 mg/mL) to 900 μL Corn oil, and mix evenly.

In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
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Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Calculation results:
Working solution concentration: mg/mL
Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
 If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation
References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 2.1298 mL 10.6489 mL 21.2979 mL 53.2447 mL
5 mM 0.4260 mL 2.1298 mL 4.2596 mL 10.6489 mL
10 mM 0.2130 mL 1.0649 mL 2.1298 mL 5.3245 mL
15 mM 0.1420 mL 0.7099 mL 1.4199 mL 3.5496 mL
20 mM 0.1065 mL 0.5324 mL 1.0649 mL 2.6622 mL
25 mM 0.0852 mL 0.4260 mL 0.8519 mL 2.1298 mL
30 mM 0.0710 mL 0.3550 mL 0.7099 mL 1.7748 mL
40 mM 0.0532 mL 0.2662 mL 0.5324 mL 1.3311 mL
50 mM 0.0426 mL 0.2130 mL 0.4260 mL 1.0649 mL
60 mM 0.0355 mL 0.1775 mL 0.3550 mL 0.8874 mL
80 mM 0.0266 mL 0.1331 mL 0.2662 mL 0.6656 mL
100 mM 0.0213 mL 0.1065 mL 0.2130 mL 0.5324 mL
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Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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HCH6-1
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